package kr.hkit.powerjava.chapter22.collection;

import java.util.HashMap;
import java.util.Map;

public class WordFreq {
	public static void main(String[] args) {
		Map<String, Integer> m = new HashMap<String, Integer>();

		String[] sample = { "to", "be", "or", "not", "to", "be", "is", "a",
				"problem" };

		for (String a : sample) {
			Integer freq = m.get(a);
			m.put(a, (freq == null) ? 1 : freq + 1);
		}

		System.out.println(m.size() + "단어가 있습니다.");
		System.out.println(m.containsKey("to"));
		System.out.println(m.isEmpty());
		System.out.println(m);

	}
}
